Well I got motivated and made a carbon scrubber to combat the smell! The design I followed was
DIY Carbon Scrubber and it was very easy! Took me about 30 minutes and it's too early to tell but I think it will work well. I could feel airflow coming out of the carbon.
I also have some bad looking spots on a few leaves. It does not seem to be affecting the new growth so I am not sure if it something I did previously or if the problem is starting there. I have not been paying close enough attention to those plants so I am not sure if it has been there for a while. Do you think this is nute burn or something else?
The problem is not affecting the other plants.
And this is the fan that blows across the plants when the lights are on. There are holes drilled in the wall section up to draw fresh air in from holes drilled at the bottom on the outer wall section. It prevents light from passing through and helps draw cooler air up from the floor outside.